Hydraulic torque converter three-dimensional blade profile modification design method based on conformal transformation

Abstract

The invention discloses a hydraulic torque converter three-dimensional blade profile modification design method based on conformal transformation, solves the problems that a traditional conformal transformation method is low in precision and serious in three-dimensional blade profile modification distortion, and belongs to the technical field of engineering machinery transmission. The method comprises: 1, giving orthographic projections of three impeller blades of the hydraulic torque converter and a circulating circle of the hydraulic torque converter; 2, finding a blade inlet and outlet sideboundary on the blade orthographic projection drawing; 3, drawing a blade curve multi-cylindrical-surface expansion diagram; 4, performing blade angle transformation, solving new blade coordinates, and obtaining a new blade space curve; and 5, sewing the blade space curve into a blade three-dimensional entity by constructing a ruled surface. According to the method provided by the invention, errors caused by traditional conformal transformation drawing can be greatly reduced, the defect of serious distortion caused by changing the angle of the blade in three dimensions is overcome, meanwhile,the precision of the shape of the head of the blade is ensured, and the defect of accumulative errors is avoided.

Description

technical field [0001] The invention belongs to the technical field of construction machinery transmission, and in particular relates to a three-dimensional blade profile modification design method for a hydraulic torque converter based on conformal transformation. Background technique [0002] Blade design is the core of torque converter design, and the traditional blade design is based on one-dimensional beam flow theory. The torque converter designed by the one-dimensional beam theory often cannot meet the actual requirements of the project, and it needs to adjust the blade parameters to meet the actual engineering needs. The blade of the hydraulic torque converter is a highly distorted spatial shape. In order to be actually produced in engineering, it is necessary to express its spatial shape, that is, to give the spatial coordinates of the blade shape. When the traditional conformal transformation expands the non-working surface curve of the blade-shaped working surfac...

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Problems solved by technology

[0004] The purpose of the present invention is to design a method for the three-dimensional blade profile modification design of a hydraulic torque converter based on conformal transformation, which solves the problem of adjusting blade angle and blade distortion in three-dimensional space

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